September

2014

 * September 11, 2014 - Hanga Kagamine is Introduced

2008

 * September 10, 2008 - Magane Len is introduced
 * September 10, 2008 - Magane Rin is introduced
 * September 25, 2008 - Isamine Kaito is introduced
 * September 27, 2008 - Kagura Gakupo is introduced
 * September 28, 2008 - Hagane Rin is introduced

2007

 * September 00, 2007 - Series concept, Yandeloid, appears
 * September 04, 2007 - Hachune Miku is introduced

Misc

 * September 15, 2000 - Birthdate of Maiden Casey
 * September 23, 0000 - Shirumi Kishin is introduced
 * September 25, 2012 - Birthdate of Nori Tenshia